ATM From Concept to Services

		ATM : From Concept to Services March 11-12, 1997 - Brussels
		A. Danthine Université de Liège

Introduction With the usual hype associated with a new technology, ATM has been presented as the jack of all trades before having, two years later, its future basically questioned. For those who believe that the ATM is a basic technology which will be deployed in the next ten years, it is important to evaluate the exact place this technology will take in order to correctly integrate it in the planning of the evolution of their network. This implies a detailed study of the service provided by ATM, as seen by the ITU on one side and by the ATM Forum on the other side. But ATM is not an isolated layer, it has to be integrated in the communication stack of today and of tomorrow when distributed multimedia applications will be widely available. Therefore, a great emphasis will be placed on the integration of the ATM service into the global communication architecture.
Table of Contents

Evolution of the Entreprise Networking

Evolution of the Network Data Rates
Evolution of the Enterprise Network Architecture
LAN : From Shared to Switched
The Internet Explosion
The Enterprise Network and the WAN
The Multimedia-based Applications

Evolution of the Public Networks

The X.25 Service
The ISDN Service
The Frame Relay Service
The B-ISDN Service

Basic Elements of an ATM Network

The Cells on the Physical Circuit
Virtual Path (VP), Virtual Channel (VC) and Virtual Channel Connection (VCC)
The Switch Fabric Principle
Types of Switch Fabric

The Service Model of the ISO and of the ITU-T

The ATM Bearer Service

B-ISDN RM and the ATM Bearer Service
Traffic Characterisation and Bandwidth Allocation
Connection Traffic Descriptor
ATM Layer Generic Functions
ATM Interfaces and Cell Headers
Summary of Functions and Facilities of the ATM Bearer Service
About the QoS
Conclusion

The ATM Adaptation Layer

The ATM Adaptation Layer and the Service Classes
AAL Type 1
AAL Type 2
AAL Type 3/4
AAL Type 5
Cell Burst
The AAL in the Control Plane

The Public Services on ATM

CO Public Services with AAL Type 1
The CLNAP layer
Connectionless Public Services with AAL Type 3/4

Signalling

ATM in the Local Area

The ATM Forum
Architecture and Logical Interfaces
From Legacy LANs to ATM LANs

Classical IP (over ATM)

IETF and ATM
IP Address Resolution and Signalling
Encapsulation
Scenario of operations

LAN Emulation

The ATM Forum
LAN Emulation Architecture & Service
The LAN Emulation servers
Scenario of Operations

ATM in the Workstation

Extension of the ATM Bearer Service

The Need for an Extension
nrt-VBR and rt-VBR
UBR without or with EPD
ABR
ABT/DT and ABT/IT

Pace of the ATM Deployment

ATM in the LAN
ATM as Backbone in a Local Area
ATM for Building Private Multisite Corporate Network
ATM in the WAN
ATM and IP
ATM as Support of Video Dial Tone Service

André DANTHINE, Professor at the University of Liege since 1967, created a research unit in networking (RUN) in 1972. In 1990, Prof. Danthine launched a new Esprit project, OSI95, to tackle the problem of the design of a new transport service and protocol (TPX) for multimedia applications in a high speed environment including B- ISDN. In 1991, he joined the RACE Project CIO. It is in the framework of this project that the ATM LAN of RUN has been connected, at 34 Mbps, to the European ATM Pilot for functional and performance evaluations. Since 1994, Prof. Danthine is also involved in another RACE project, ACCOPI. November 1995 was the starting point of OKAPI, an ACTS project. Since 1992, Prof. Danthine is the chairman of the COST action 237 on "Multimedia Telecommunication Services". Prof. Danthine is a member of ACM, of IEEE, of the Editorial Board of "ETT", of the Editorial Advisory Board of the Wiley Series in "Communication and Distributed Systems", editor of several books and proceedings and author of more than hundred papers. Chairman of the TC6 of IFIP from 1979 to 1985, he is Governor of ICCC since 1982. CRB Fellow in 1960, he received the Melchior Salier Prize in 1960, the "Bell Telephone-100th Anniversary" prize in 1983 and the IFIP Silver Core in 1986. In 1993-1994, he was Francqui Professor at the VUB. He is Doctor of Science Honoris Causa of the University of Kent (1991) and of the University Paul Sabatier in Toulouse (1996).

This two-day tutorial was presented in Brussels in March 1997

Editor: -G. Leduc-
Webmaster: -S. Calomme- CSS | RUN | Montefiore | ULg
© 1998-1999 Last Modified: Thu March 11 1999

Introduction

Table of Contents